CFD Analysis for Thermal Behavior of Turbulent Channel Flow of Different Geometry of Bottom Plate

Size: px
Start display at page:

Download "CFD Analysis for Thermal Behavior of Turbulent Channel Flow of Different Geometry of Bottom Plate"

Transcription

1 International Journal Of Engineering Research And Development e-issn: X, p-issn: X, Volume 13, Issue 9 (September 2017), PP CFD Analysis for Thermal Behavior of Turbulent Channel Flow of Different Geometry of Bottom Plate * Rohit Joshi 1, Dr. Satyendra Singh 2 1 PG Scholar, Department of Mechanical Engineering, BTKIT Dwarahat 2 Associate Professor & Head, Department of Mechanical Engineering, BTKIT Dwarahat Corresponding Author: * Rohit Joshi ABSTRACT: The present work is carried out to investigate heat transfer and friction factor characteristics of fluid (air) flow through turbulent channel i.e. parallel plate heat exchanger for different geometry and designs parameters, with a bottom plate applied to uniform constant heat flux thermal boundary condition, and upper plate is provided with a insulated condition. The fluid domain is designed using ANSYS Workbench v15 software and simulated using ANSYS Fluent v15 software, which is based on finite element method. Realizable k-ε turbulent model with wall function is applied for solving turbulence in the domain, and second-order upwind scheme was provided for calculation. The SIMPLE algorithm was adopted to handle the pressure-velocity coupling in the calculation. Parameters like Nusselt number, friction factor and heat transfer coefficient have been obtained for the designs and different contours of temperature, turbulent kinetic energy and velocity magnitude are also presented. The geometries used for bottom plate of heat exchanger are trapezoidal grooved, ribbed and rib-grooved plate, and the groove/rib length (B) to channel height (H) ratio are taken as 0.5, 0.75, 1.0, 1.25 and 1.5 for all three geometry and simulation is done for turbulent regime from 6000 to Reynolds number. The main objective is to find optimum B/H ratio under similar boundary condition. The optimum B/H ratio are found according to thermal analysis of trapezoidal grooved, ribbed and rib-grooved is 1.0, 1.25 and 1.5 respectively at Reynolds number is Keyword: Turbulent channel, ANSYS Fluent, 2-D Analysis, Different geometries, Friction Factor I. INTRODUCTION The improvement of convective heat transfer in thermal systems is needed in many engineering applications with a view to reducing the size, weight and cost of heat exchangers. Attempts have been made to enhance heat transfer in the heat exchangers by using roughen surfaces or turbulators such as rib, groove and helical rib in disturbing the flow and in providing transverse/longitudinal vortices or three dimensional mixing. Comprehensive reviews on heat transfer enhancement by periodic surfaces mounted obstacles have rarely been found because of the wide variability of geometric parameters A review of measurements of global heat transfer coefficient and pressure drop for various rib configurations was given by Dalle Donne and Meyer [1]. Martin and Bates [2] presented velocity field and the turbulence structure in an asymmetrically ribbed rectangular channel with one rib configuration of square ribs and varying channel height. Hong and Hsieh [3] investigated the influence of rib alignment on forced convection in a channel at different rib alignments, either staggered or inline, on the internal surfaces of rectangular or square channels. Jaurker et al. [4] reported the heat transfer and friction characteristics of rib grooved artificial roughness on one broad heated wall of a large aspect ratio duct. Distributions of the heat transfer coefficient and the pressure drop along the wall inside an asymmetrically ribbed channel measured for thermally developing and turbulent flow over periodic grooves were studied by Lorenz et al. [5]. Numerical investigations on turbulent flow friction and heat transfer enhancement in ducts or channels with rib, groove or rib groove turbulators have been carried out extensively. Chaube et al. [6] investigated the flow and heat transfer characteristics of a two dimensional rib roughened rectangular duct with only one principal heating wall by using the shear stress transport k ω turbulence model. Saidi and Sunden [7] studied the thermal characteristics in a duct with rib turbulators by using a simple eddy viscosity model and an explicit algebraic stress model and reported that the algebraic stress model has some superiority over the eddy viscosity model for only velocity field structure prediction. Tatsumi et al. [8] investigated numerically the flow around a discrete rib attached obliquely to the flow direction onto the bottom wall of a square duct and found that noticeable heat transfer augmentation was obtained downstream of the rib, produced by a strong secondary flow motion. Yang and Hwang [9] numerically examine the heat transfer enhancement in rectangular ducts with slit and solid ribs. 12

2 2. Geometry of the present problem The geometry is made for analysis are different types of turbulent channel having protruded bottom plate which are made up of aluminum having length 1.88m and hydraulic diameter of 0.08m in which internal fluid flow occurs. Protrusions made in bottom plate of three different channels are as follows:- 1. Plate with groove having 9 grooves. 2. Plate with groove having 9 grooves. 3. Plate with rib-groove, 4 ribs and 5 grooves. Turbulent channel consist of three sections: 1. Entry section 2. Test section 3. Exit section The geometries of ribbed, grooved and rib-grooved channel are shown in fig Table 1: Geometrical data of the model Total length (m) 1.88 Entry length (m) 0.8 Test section length(m) 0.68 Exit length (m) 0.4 Distance between two plates H, (m) 0.04 Groove depth T, (m) 0.02 Rib height T, (m) 0.02 Groove length B, (m) 0.02, 0.03, 0.04, 0.05, 0.06 Rib length B, (m) 0.02, 0.03, 0.04, 0.05, 0.06 Fig 1 Schematic diagram for grooved channel Fig 2 Schematic diagram for ribbed channel 13

3 Fig 3 Schematic diagram for rib-grooved channel II. MATHEMATICAL MODELING 3.1. Flow governing equations The phenomenon under consideration is governed by the steady 2-D form of the continuity, the time-averaged incompressible Navier Stokes equations and the energy equation. In the Cartesian tensor system these equations can be written as: Continuity equation: x i ρu i = 0 (1) Momentum equation: (ρu i u j ) = p + u j x i equation: μ u i + u j u i + ρu i u j (2) Energy ρu x i T = τ + τ T i x t (3) j Where τ and τ t are molecular thermal diffusivity and turbulent thermal diffusivity, respectively and are given by τ = μ Pr, and τ = μ t Pr t (4) The Reynolds-averaged approach to turbulence modeling requires that the Reynolds stresses, ρu i u j in Eq. (2) needs to be modeled. For closure of the equations, the k ε turbulence model is chosen. A common method employs the Boussinesq hypothesis to relate the Reynolds stresses to the mean velocity gradients: ρu i u j = μ u i u j + u j u i (5) The turbulent viscosity term μ t is to be computed from an appropriate turbulence model. The expression for the turbulent viscosity is given as μ t = ρc μ K 2 ε (6) The modeled equation of the TKE, k is written as: ρku x i = i μ + μ t σ k k + G k ρε (7) Similarly the dissipation rate of TKE, ε is given by the following equation: ρεu x i = i μ + μ t σ ε ε ε + C 1ε G k k C 2ε ρ ε2 k (8) 14

4 where G k is the rate of generation of the TKE while ρε is its destruction rate. G k is written as: G K = ρu i u j u j u i (9) The boundary values for the turbulent quantities near the wall are specified with the enhanced wall treatment method. C μ =0.09, C 1ε =1.44, C 2ε =1.92, σ k =1.0, σ ε =1.3 and Pr t =0.9 are chosen to be empirical constants in the turbulence transport equations. Fig.4 Contours of static temperature of fluid for grooved at Re = 6000 for B/H = 1 Fig.5 Contours of static temperature of fluid for ribbed at Re = 6000 for B/H = 1.25 Fig.6 Contours of static temperature of fluid for rib-grooved at Re = 6000 for B/H = Turbulence models In contrast to the molecular viscosity, the eddy viscosity depends strongly on the flow property. Therefore, selecting the turbulence model, to accommodate the flow behavior of each application, is very important. To attain the accurate aerodynamic prediction in the grooved channel, the predictive ability of four different turbulence models, including the standard k ε turbulence model the Renormalized Group (RNG) k ε turbulence model, the standard k ω turbulence model and The Shear Stress Transport (SST) k ω turbulence models are investigated. 15

5 3.3. Solution procedure The time-independent incompressible Navier Stokes equations and the turbulence model were discretized using the finite volume method QUICK (Quadratic upstream interpolation for convective kinetics differencing scheme) and central differencing flow numerical schemes were applied for convective and diffusive terms, respectively. The discretized nonlinear equations were implemented implicitly. To evaluate the pressure field, the pressure velocity coupling algorithm SIMPLE (Semi Implicit Method for Pressure-Linked Equations) was selected. At the inlet, uniform velocity profile has been imposed. Impermeable boundary condition has been implemented over the channel wall while constant heat flux condition is applied to the lower wall of test section. The turbulence intensity was kept at 10% at the inlet. Two parameters of interest for the present case are: (1) friction factor, (2) Nusselt number. The friction factor, f is computed by pressure drop, Δp across the length of test section, L, having the hydraulic diameter, D h. f = p L D h 1 2 ρu 2 (10) The heat transfer is measured by local Nusselt number which can be obtained by Nu x = h(x)d h k (11) Fig.7 X-velocity contours at Re = 6000 for B/H = 1 Fig.8 X-velocity contours at Re = 6000 for B/H = 1.25 Fig.9 X-velocity contours at Re = 6000 for B/H = 1.5 III. NUMERICAL RESULTS 4.1. Effect of turbulence models When compares the axial variation of surface Nusselt number along a single groove of one pitch of previous measured data [5] with the present work using various turbulence models (the standard k ε model, the RNG k ε model, the standard k ω model and the SST k ω model) at Re=12,000 and B/H=1.0. The average top surface Nusselt number of the channel with a groove is also shown in the figure. The numerical predicted result with the RNG k ε turbulence model or the standard k ε turbulence model agrees well with the experimental data [5] than that with the standard k ω model or the SST k ω model, except at l/h=1.5 to 2.0. The predicted and 16

6 measured results are in a similar trend for using both the RNG k ε model and the standard k ε model. Thus, any of the RNG k ε model or the standard k ε model appears to be suitable in prediction of this flow. The highest heat transfer rate is found on the top surface of rib or at l/h=0.5 to Flow structure Fig.7-9 shows X-velocity contours at Re = 6000 for B/H ratio 1, 1.25 and 1.5 of trapezoidal grooved, ribbed and rib-grooved respectively. It can be visible that the largest re-circulation zone can be found in the groove region for B/H=1.5 the larger the groove, the longer becomes the re-circulation zone. The contour plots of turbulence kinetic energy are displayed in Fig. 7-9 for different width ratios (B/H). The peak turbulence intensity values, predicted by the k ε turbulence model, are seen on the top of rib front regions, while the turbulence intensity is observed to be very low at groove bottom wall area. A large turbulence kinetic energy zone is found between the adjacent ribs close to the main flow which yields the strong influence of turbulence intensity on heat transfer enhancement Heat transfer The comparison between Reynolds number and Nusselt number is presented in fig.10. From fig. it is observed that the maximum heat transfer occurred when the B/H ratio is 0.5. Fig.11 presents the heat transfer results for air flow in the channel for five different groove-width ratios (B/H=0.5, 0.75, 1.0, 1.25, and1.5). In the fig. 11 the mean Nusselt numbers are related as a function of Reynolds number. The result obtained from smooth channel is also plotted for comparison. The variation of average Nusselt number is also presented in the fig. 11 which shows that the Nusselt number. Fig.10 Validation of trapezoid grooved channel Increases with the increase of Reynolds number. In all cases, the grooved channel flows give higher values of Nusselt number than that for smooth channel flow due to the induction of high re-circulation/reverse flow and thin boundary layer in the grooved channel, leading to higher temperature gradients. Fig.11 Variation of (Nu) with (Re) for trapezoid grooved channel 4.5. Friction loss Fig shows the predicted results of friction factor using the k ε turbulence model for different width ratios (B/H) in the range of Reynolds number investigated for fixed values of other parameters. It is seen that the friction factor decreases with increasing Reynolds number in all cases due to the suppression of viscous sub-layer with the increase of Reynolds number. The grooved channel is seen to yield higher friction factor than the smooth channel. 17

7 Fig. 12 Variation of friction factor with Reynolds number for grooved geometry Fig.13 Variation of friction factor with Reynolds number for ribbed geometry Fig.14 Variation of friction factor with Reynolds number for rib-grooved geometry. The increase in Nusselt number values for using B/H=0.5, 0.75, 1.0, 1.25, and1.5, when compared with rectangular grooved channel shown in table 2. Table 2: Showing increment in Nusselt number compared with rectangular grooved channel Reynolds B/H Increment in Nusselt number % Number Grooved Ribbed Ribgrooved Null Null Null Table 3: Shows increment in Nusselt number compared with smooth channel Reynolds B/H Increment in Nusselt number % 18

8 Number Grooved Ribbed Ribgrooved Above table 3 shows Increment in Nusselt number for different trapezoid geometry when compared to smooth turbulent channel. IV. CONCLUSIONS In this present investigation, a numerical prediction has been conducted to study heat transfer and flow friction behaviors in turbulent channel flows over periodic trapezoidal grooves, ribbed and rib-grooved shape of bottom plate. Verification of the heat transfer of the groove channel is performed by comparing with the previous research under similar conditions. So finally result showed a trend of increase in heat transfer with the provision of different geometries of plate surface for same thermal boundary conditions. The increase of heat transfer however was not found to be proportional to increase in ratio B/H of the trapezoidal rib, groove and rib-groove respectively. REFERENCES [1]. M. Dalle Donne, L. Meyer, Turbulent convective heat transfer from rough surfaces with two-dimensional rectangular ribs, International Journal Heat and Mass Transfer 20 (1977) [2]. S.R. Martin, C.J. Bates, Small-probe-volume Laser Doppler Anemometry measurements of turbulent flow near the wall of a rib-roughened channel, Flow Measurement Instrumentation 3 (1992) [3]. Y.M. Hong, S.S. Hsieh, Heat transfer and friction factor measurement in ducts with staggered and inline ribs, Transaction ASME Journal Heat Transfer 115 (1993) [4]. A.R. Jaurker, J.S. Saini, B.K. Gandhi, Heat transfer and friction characteristics of rectangular solar air heater duct using rib grooved artificial roughness, Solar Energy 80 (2006) [5]. S. Lorenz, D. Mukomilow, W. Leiner, Distribution of the heat transfer coefficient in a channel with periodic transverse grooves, Experimental Thermal and Fluid Science 11 (1995) [6]. A. Chaube, P.K. Sahoo, S.C. Solanki, Analysis of heat transfer augmentation and flow [7]. characteristics due to rib roughness over absorber plate of a solar air heater, Renewable Energy 31 (2006) [8]. A. Saidi, B. Sunden, Numerical simulation of turbulent convective heat transfer in square ribbed ducts, Numerical Heat Transfer, Part A: Applications 38 (1) (2000) [9]. K. Tatsumi, H. Iwai, K. Inaoka, K. Suzuki, Numerical analysis for heat transfer characteristics of an oblique discrete rib mounted in a square duct, Numerical Heat Transfer, Part A: Applications 44 (8) (2003) [10]. Y.T. Yang, C.W. Hwang, Numerical calculations of heat transfer and friction characteristics in rectangular ducts with slit and solid ribs mounted on one wall, Numerical Heat Transfer, Part A: Applications 45 (4) (2004) *Rohit Joshi. CFD Analysis for Thermal Behavior of Turbulent Channel Flow of Different Geometry of Bottom Plate. International Journal of Engineering Research and Development, vol. 13, no. 09, 2017, pp

COMPUTATIONAL FLUID DYNAMICS ANALYSIS OF A V-RIB WITH GAP ROUGHENED SOLAR AIR HEATER

COMPUTATIONAL FLUID DYNAMICS ANALYSIS OF A V-RIB WITH GAP ROUGHENED SOLAR AIR HEATER THERMAL SCIENCE: Year 2018, Vol. 22, No. 2, pp. 963-972 963 COMPUTATIONAL FLUID DYNAMICS ANALYSIS OF A V-RIB WITH GAP ROUGHENED SOLAR AIR HEATER by Jitesh RANA, Anshuman SILORI, Rajesh MAITHANI *, and

More information

INTERNATIONAL JOURNAL OF SCIENTIFIC & TECHNOLOGY RESEARCH VOLUME 5, ISSUE 09, SEPTEMBER 2016 ISSN

INTERNATIONAL JOURNAL OF SCIENTIFIC & TECHNOLOGY RESEARCH VOLUME 5, ISSUE 09, SEPTEMBER 2016 ISSN Numerical Analysis Of Heat Transfer And Fluid Flow Characteristics In Different V-Shaped Roughness Elements On The Absorber Plate Of Solar Air Heater Duct Jitesh Rana, Anshuman Silori, Rohan Ramola Abstract:

More information

International Journal of Scientific & Engineering Research, Volume 6, Issue 5, May ISSN

International Journal of Scientific & Engineering Research, Volume 6, Issue 5, May ISSN International Journal of Scientific & Engineering Research, Volume 6, Issue 5, May-2015 28 CFD BASED HEAT TRANSFER ANALYSIS OF SOLAR AIR HEATER DUCT PROVIDED WITH ARTIFICIAL ROUGHNESS Vivek Rao, Dr. Ajay

More information

A Computational Fluid Dynamics Investigation of Solar Air Heater Duct Provided with Inclined Circular Ribs as Artificial Roughness

A Computational Fluid Dynamics Investigation of Solar Air Heater Duct Provided with Inclined Circular Ribs as Artificial Roughness Bonfring International Journal of Industrial Engineering and Management Science, Vol. 4, No. 3, August 2014 115 A Computational Fluid Dynamics Investigation of Solar Air Heater Duct Provided with Inclined

More information

Effect of roughness shape on heat transfer and flow friction characteristics of solar air heater with roughened absorber plate

Effect of roughness shape on heat transfer and flow friction characteristics of solar air heater with roughened absorber plate Advanced Computational Methods in Heat Transfer IX 43 Effect of roughness shape on heat transfer and flow friction characteristics of solar air heater with roughened absorber plate A. Chaube 1, P. K. Sahoo

More information

A CFD Analysis Of A Solar Air Heater Having Triangular Rib Roughness On The Absorber Plate

A CFD Analysis Of A Solar Air Heater Having Triangular Rib Roughness On The Absorber Plate International Journal of ChemTech Research CODEN( USA): IJCRGG ISSN : 0974-4290 Vol.5, No.2, pp 964-971, April-June 2013 ICGSEE-2013[14th 16th March 2013] International Conference on Global Scenario in

More information

Computational Fluid Dynamics Based Analysis of Angled Rib Roughened Solar Air Heater Duct

Computational Fluid Dynamics Based Analysis of Angled Rib Roughened Solar Air Heater Duct Research Article International Journal of Thermal Technologies ISSN 2277-4114 2013 INPRESSCO. All Rights Reserved. Available at http://inpressco.com/category/ijtt Computational Fluid Dynamics Based Analysis

More information

International Journal of Advanced Engineering Technology E-ISSN

International Journal of Advanced Engineering Technology E-ISSN Research Article EFFECT OF ROUGHNESS ELEMENT PITCH ON HEAT TRANSFER AND FRICTION CHARACTERISTICS OF ARTIFICIALLY ROUGHENED SOLAR AIR HEATER DUCT Aman Soi*, Ranjit Singh, Brij Bhushan Address for Correspondence

More information

CFD analysis of solar air heater having absorber plate roughened with compound turbulators

CFD analysis of solar air heater having absorber plate roughened with compound turbulators CFD analysis of solar air heater having absorber plate roughened with compound turbulators 1 Mr. Obaid Ul Haque Ansari, 2 Dr. V.R. Kalamkar, 1 PG Student, 2 Associate Professor 1 Department of Mechanical

More information

Numerical Investigation of Heat Transfer and Fluid Flow Characteristics of Roughened Solar Air Heater Duct

Numerical Investigation of Heat Transfer and Fluid Flow Characteristics of Roughened Solar Air Heater Duct 4th International Conference on Mechanical, Electronics and Mechatronics Engineering (ICMEME'2) Dec. -16, 2 Pattaya (Thailand) Numerical Investigation of Heat Transfer and Fluid Flow Characteristics of

More information

IJSRD - International Journal for Scientific Research & Development Vol. 3, Issue 06, 2015 ISSN (online):

IJSRD - International Journal for Scientific Research & Development Vol. 3, Issue 06, 2015 ISSN (online): IJSRD - International Journal for Scientific Research & Development Vol. 3, Issue 06, 2015 ISSN (online): 2321-0613 Experimental Investigation for Enhancement of Heat Transfer in Two Pass Solar Air Heater

More information

Exergy Analysis of Solar Air Collector Having W Shaped Artificial Roughness

Exergy Analysis of Solar Air Collector Having W Shaped Artificial Roughness Advances in Materials Science and Mechanical Engineering Research Volume 1, Number 1 (2015), pp. 25-32 International Research Publication House http://www.irphouse.com Exergy Analysis of Solar Air Collector

More information

Comparative study of Different Geometry of Ribs for roughness on absorber plate of Solar Air Heater -A Review

Comparative study of Different Geometry of Ribs for roughness on absorber plate of Solar Air Heater -A Review Comparative study of Different Geometry of Ribs for roughness on absorber plate of Solar Air Heater -A Review Gulshan Singh Baghel 1, Dr. A R Jaurker 2 1. Student, M.E. (Heat Power engineering), Jabalpur

More information

International Communications in Heat and Mass Transfer

International Communications in Heat and Mass Transfer International Communications in Heat and Mass Transfer 38 (2011) 1392 1399 Contents lists available at ScienceDirect International Communications in Heat and Mass Transfer journal homepage: www.elsevier.com/locate/ichmt

More information

ENERGY PERFORMANCE IMPROVEMENT, FLOW BEHAVIOR AND HEAT TRANSFER INVESTIGATION IN A CIRCULAR TUBE WITH V-DOWNSTREAM DISCRETE BAFFLES

ENERGY PERFORMANCE IMPROVEMENT, FLOW BEHAVIOR AND HEAT TRANSFER INVESTIGATION IN A CIRCULAR TUBE WITH V-DOWNSTREAM DISCRETE BAFFLES Journal of Mathematics and Statistics 9 (4): 339-348, 2013 ISSN: 1549-3644 2013 doi:10.3844/jmssp.2013.339.348 Published Online 9 (4) 2013 (http://www.thescipub.com/jmss.toc) ENERGY PERFORMANCE IMPROVEMENT,

More information

Heat transfer and fluid flow analysis of roughness ribin solar air heater duct by computational fluid dynamics (CFD)

Heat transfer and fluid flow analysis of roughness ribin solar air heater duct by computational fluid dynamics (CFD) Current World Environment Vol. 5(2), 279-285 (2010) Heat transfer and fluid flow analysis of roughness ribin solar air heater duct by computational fluid dynamics (CFD) PRASHANT BAREDAR¹, SHANKAR KUMAR²,

More information

Numerical Heat Transfer Study of Turbulent Square Duct Flow through W-Type Turbulators

Numerical Heat Transfer Study of Turbulent Square Duct Flow through W-Type Turbulators search Article International Journal of Thermal Technologies E-ISSN 2277 4114 214 INPRESSCO, All Rights served Available at http://inpressco.com/category/ijtt/ merical Heat Transfer Study of Turbulent

More information

CFD Analysis of Heat Transfer through Artificially Roughened Solar Duct

CFD Analysis of Heat Transfer through Artificially Roughened Solar Duct CFD Analysis of Heat Transfer through Artificially Roughened Solar Duct Suman Saurav #1, V.N.Bartaria *2 # M.E Scholar,Lakshmi Narain College of Technology, Bhopal,Madhya Pradesh- 462041(India) * Mechanical

More information

3D Numerical Study on Laminar Forced Convection in V-Baffled Square Channel

3D Numerical Study on Laminar Forced Convection in V-Baffled Square Channel American Journal of Applied Sciences 10 (10): 1287-1297, 2013 ISSN: 1546-9239 2013 Boonloi and Jedsadaratanachai, This open access article is distributed under a Creative Commons Attribution (CC-BY) 3.0

More information

Numerical Investigation on Turbulent Forced Convection in Heating Channel Inserted with Discrete V-Shaped Baffles

Numerical Investigation on Turbulent Forced Convection in Heating Channel Inserted with Discrete V-Shaped Baffles Journal of Mathematics and Statistics Original Research Paper Numerical Investigation on Turbulent Forced Convection in Heating Channel Inserted with Discrete V-Shaped Baffles 1 Amnart Boonloi and 2 Withada

More information

HEAT TRANSFER AND FRICTION FACTOR CHARACTERISTICS OF COMPOUND TURBULATORS IN RECTANGULAR DUCTS OF SOLAR AIR HEATER

HEAT TRANSFER AND FRICTION FACTOR CHARACTERISTICS OF COMPOUND TURBULATORS IN RECTANGULAR DUCTS OF SOLAR AIR HEATER HEAT TRANSFER AND FRICTION FACTOR CHARACTERISTICS OF COMPOUND TURBULATORS IN RECTANGULAR DUCTS OF SOLAR AIR HEATER C.B.Pawar*, K.R.Aharwal 1 and Alok Chaube 2 1. Department of Mechanical Engineering, Shri

More information

EFFECT OF BAFFLES GEOMETRY ON HEAT TRANSFER ENHANCEMENT INSIDE CORRUGATED DUCT

EFFECT OF BAFFLES GEOMETRY ON HEAT TRANSFER ENHANCEMENT INSIDE CORRUGATED DUCT International Journal of Mechanical Engineering and Technology (IJMET) Volume 10, Issue 03, March 2019, pp. 555-566. Article ID: IJMET_10_03_057 Available online at http://www.iaeme.com/ijmet/issues.asp?jtype=ijmet&vtype=10&itype=3

More information

W-Discrete Rib for Enhancing the Thermal Performance of Solar Air Heater

W-Discrete Rib for Enhancing the Thermal Performance of Solar Air Heater W-Discrete Rib for Enhancing the Thermal Performance of Solar Air Heater Alok Kumar Rohit 1, A.M. Lanjewar 2 1PhD Scholar, Mechanical Engineering Department, AISECT University Bhopal, M.P. - 462024 India

More information

Numerical Investigation of Heat Transfer and Fluid Flow Characteristics of Square Type Tabulator Roughness Solar Air Heater

Numerical Investigation of Heat Transfer and Fluid Flow Characteristics of Square Type Tabulator Roughness Solar Air Heater Numerical Investigation of Heat Transfer and Fluid Flow Characteristics of Square Type Tabulator Roughness Solar Air Heater 1 Vikas Kesharwani, 2 Ravi Vishwakarma 1 Department of Mechanical Engineering,

More information

Turbulent Boundary Layers & Turbulence Models. Lecture 09

Turbulent Boundary Layers & Turbulence Models. Lecture 09 Turbulent Boundary Layers & Turbulence Models Lecture 09 The turbulent boundary layer In turbulent flow, the boundary layer is defined as the thin region on the surface of a body in which viscous effects

More information

"Experimental investigation of heat transfer enhancement by u-shaped Turbulator"

Experimental investigation of heat transfer enhancement by u-shaped Turbulator "Experimental investigation of heat transfer enhancement by u-shaped Turbulator" Pawar Shubham (1),Pailwan Vidyadhar (2), Kothawale Shridhar (3), Vaibhav Sonavane (4),Akshay Londhe (5) 1,2,3,4UG Scholar,

More information

EFFECT OF STAGGERED RIB LENGTH ON PERFORMANCE OF SOLAR AIR HEATER USING V-RIB WITH SYMMETRICAL GAP AND STAGGERED RIB

EFFECT OF STAGGERED RIB LENGTH ON PERFORMANCE OF SOLAR AIR HEATER USING V-RIB WITH SYMMETRICAL GAP AND STAGGERED RIB EFFECT OF STAGGERED RIB LENGTH ON PERFORMANCE OF SOLAR AIR HEATER USING V-RIB WITH SYMMETRICAL GAP AND STAGGERED RIB Piyush Kumar Jain and Atul Lanjewar Department of Mechanical Engineering, Maulana Azad

More information

NUMERICAL SIMULATION ON RECTANGULAR CONVERGENT AND DIVERGENT RIBBED CHANNELS

NUMERICAL SIMULATION ON RECTANGULAR CONVERGENT AND DIVERGENT RIBBED CHANNELS NUMERICAL SIMULATION ON RECTANGULAR CONVERGENT AND DIVERGENT RIBBED CHANNELS K. Sivakumar 1, E. Natarajan and N. Kulasekharan 3 1 Valliammai Engineering College, Chennai, India Institute of Energy Studies,

More information

Performance Of Solar Air Heaters With Corrugated Absorber Plate- A CFD Approach

Performance Of Solar Air Heaters With Corrugated Absorber Plate- A CFD Approach Performance Of Solar Air Heaters With Corrugated Absorber Plate- A CFD Approach Dr. Ashwini Kumar Prof. Avinash Gholap Prof. Rohit Gangarde Professor (Asst.), Department of Mechanical Engineering, H.S.B.P.V.T

More information

Numerical and Experimental Investigation of Heat Transfer Using Discrete Ribs

Numerical and Experimental Investigation of Heat Transfer Using Discrete Ribs Numerical and Experimental Investigation of Heat Transfer Using Discrete Ribs #1 Sandip T.Jadhav, #2 R. D. Shelke, #3 H. N. Deshpande #1 Research scholar, Department of Mechanical Engineering, PES s MCOE,SavitribaiPhule

More information

NUMERICAL HEAT TRANSFER ENHANCEMENT IN SQUARE DUCT WITH INTERNAL RIB

NUMERICAL HEAT TRANSFER ENHANCEMENT IN SQUARE DUCT WITH INTERNAL RIB NUMERICAL HEAT TRANSFER ENHANCEMENT IN SQUARE DUCT WITH INTERNAL RIB University of Technology Department Mechanical engineering Baghdad, Iraq ABSTRACT - This paper presents numerical investigation of heat

More information

TURBULENCE AND PRESSURE DROP BEHAVIORS AROUND SEMICIRCULAR RIBS IN A RECTANGULAR CHANNEL

TURBULENCE AND PRESSURE DROP BEHAVIORS AROUND SEMICIRCULAR RIBS IN A RECTANGULAR CHANNEL THERMAL SCIENCE: Year 2014, Vol. 18, No. 2, pp. 419-430 419 TURBULENCE AND PRESSURE DROP BEHAVIORS AROUND SEMICIRCULAR RIBS IN A RECTANGULAR CHANNEL by Md. Julker NINE a, Gyeong Hwan LEE a, HanShik CHUNG

More information

Analysis of Heat Transfer in Pipe with Twisted Tape Inserts

Analysis of Heat Transfer in Pipe with Twisted Tape Inserts Proceedings of the 2 nd International Conference on Fluid Flow, Heat and Mass Transfer Ottawa, Ontario, Canada, April 30 May 1, 2015 Paper No. 143 Analysis of Heat Transfer in Pipe with Twisted Tape Inserts

More information

Laminar Forced Convection and Heat Transfer Characteristics in a Square Channel Equipped with V-Wavy Surface

Laminar Forced Convection and Heat Transfer Characteristics in a Square Channel Equipped with V-Wavy Surface Journal of Mathematics and Statistics Original Research Paper Laminar Forced Convection and Heat Transfer Characteristics in a Square Channel Equipped with V-Wavy Surface 1 Amnart Boonloi and 2 Withada

More information

Laminar flow heat transfer studies in a twisted square duct for constant wall heat flux boundary condition

Laminar flow heat transfer studies in a twisted square duct for constant wall heat flux boundary condition Sādhanā Vol. 40, Part 2, April 2015, pp. 467 485. c Indian Academy of Sciences Laminar flow heat transfer studies in a twisted square duct for constant wall heat flux boundary condition RAMBIR BHADOURIYA,

More information

Flow and Heat Transfer Profiles in a Square Channel with 45 V-Downstream Orifices

Flow and Heat Transfer Profiles in a Square Channel with 45 V-Downstream Orifices Journal of Mathematics and Statistics Original Research Paper Flow and Heat Transfer Profiles in a Square Channel with 45 V-Downstream Orifices 1 Withada Jedsadaratanachai and 2 Amnart Boonloi 1 Department

More information

CHAPTER 7 NUMERICAL MODELLING OF A SPIRAL HEAT EXCHANGER USING CFD TECHNIQUE

CHAPTER 7 NUMERICAL MODELLING OF A SPIRAL HEAT EXCHANGER USING CFD TECHNIQUE CHAPTER 7 NUMERICAL MODELLING OF A SPIRAL HEAT EXCHANGER USING CFD TECHNIQUE In this chapter, the governing equations for the proposed numerical model with discretisation methods are presented. Spiral

More information

CFD in Heat Transfer Equipment Professor Bengt Sunden Division of Heat Transfer Department of Energy Sciences Lund University

CFD in Heat Transfer Equipment Professor Bengt Sunden Division of Heat Transfer Department of Energy Sciences Lund University CFD in Heat Transfer Equipment Professor Bengt Sunden Division of Heat Transfer Department of Energy Sciences Lund University email: bengt.sunden@energy.lth.se CFD? CFD = Computational Fluid Dynamics;

More information

Heat Transfer Enhancement of Solar Air Heater By Using Artificial Roughness double inclined ribs

Heat Transfer Enhancement of Solar Air Heater By Using Artificial Roughness double inclined ribs Heat Transfer Enhancement of Solar Air Heater By Using Artificial Roughness double inclined ribs Faisal mujib¹, Ravindra mohan² ¹Research Scholar, ²Assistant Professor, Mechanical Engineering Dept. IES

More information

LAMINAR NATURAL CONVECTION HEAT TRANSFER FROM AN ISOTHERMAL VERTICAL RIBBED PLATE

LAMINAR NATURAL CONVECTION HEAT TRANSFER FROM AN ISOTHERMAL VERTICAL RIBBED PLATE HEFAT2014 10 th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics 14 16 July 2014 Orlando, Florida LAMINAR NATURAL CONVECTION HEAT TRANSFER FROM AN ISOTHERMAL VERTICAL RIBBED

More information

Comparison of two equations closure turbulence models for the prediction of heat and mass transfer in a mechanically ventilated enclosure

Comparison of two equations closure turbulence models for the prediction of heat and mass transfer in a mechanically ventilated enclosure Proceedings of 4 th ICCHMT May 17-0, 005, Paris-Cachan, FRANCE 381 Comparison of two equations closure turbulence models for the prediction of heat and mass transfer in a mechanically ventilated enclosure

More information

CFD study for cross flow heat exchanger with integral finned tube

CFD study for cross flow heat exchanger with integral finned tube International Journal of Scientific and Research Publications, Volume 6, Issue 6, June 2016 668 CFD study for cross flow heat exchanger with integral finned tube Zena K. Kadhim *, Muna S. Kassim **, Adel

More information

Performance Investigation of Artificially Roughened Duct used in Solar Air Heaters

Performance Investigation of Artificially Roughened Duct used in Solar Air Heaters International Performance Journal Investigation of Product of Artificially Design Roughened Duct used in Solar Air Heaters January-June 2011, Volume 1, Number 1, pp. 45 62 Performance Investigation of

More information

Thermo Hydraulic Performance of Solar Air Heater by Using Double Inclined Discrete Rib Roughened Absorber Plate

Thermo Hydraulic Performance of Solar Air Heater by Using Double Inclined Discrete Rib Roughened Absorber Plate Thermo Hydraulic Performance of Solar Air Heater by Using Double Inclined Discrete Rib Roughened Absorber Plate Rahul kumar¹, Ravindra mohan² ¹Research Scholar, ²Assistant Professor, Mechanical Engineering

More information

Thermo-Hydraulic Performance of a Roughened Square Duct Having Inclined Ribs with a Gap on Two Opposite Walls

Thermo-Hydraulic Performance of a Roughened Square Duct Having Inclined Ribs with a Gap on Two Opposite Walls International Journal of Engineering Research and Development e-issn: 2278-067X, p-issn: 2278-800X, www.ijerd.com Volume 7, Issue 10 (July 2013), PP. 55-63 Thermo-Hydraulic Performance of a Roughened Square

More information

Augmented Heat Transfer in Square ducts with Transverse and Inclined Ribs with and without a gap

Augmented Heat Transfer in Square ducts with Transverse and Inclined Ribs with and without a gap Research Article International Journal of Current Engineering and Technology ISSN 2277-4106 2013 INPRESSCO. All Rights Reserved. Available at http://inpressco.com/category/ijcet Augmented Heat Transfer

More information

Comparative Analysis of Heat Transfer and Friction Characteristics in a Corrugated Tube

Comparative Analysis of Heat Transfer and Friction Characteristics in a Corrugated Tube International Journal of Current Engineering and Technology E-ISSN 2277 416, P-ISSN 2347 5161 216 INPRESSCO, All Rights Reserved Available at http://inpressco.com/category/ijcet Research Article Comparative

More information

Numerical Study on Heat Transfer Enhancement in a Rectangular Duct with V-Shaped Ribs

Numerical Study on Heat Transfer Enhancement in a Rectangular Duct with V-Shaped Ribs 1285 A publication of CHEMICAL ENGINEERING TRANSACTIONS VOL. 70, 2018 Guest Editors: Timothy G. Walmsley, Petar S. Varbanov, Rongxin Su, Jiří J. Klemeš Copyright 2018, AIDIC Servizi S.r.l. ISBN 978-88-95608-67-9;

More information

A Computational Investigation of a Turbulent Flow Over a Backward Facing Step with OpenFOAM

A Computational Investigation of a Turbulent Flow Over a Backward Facing Step with OpenFOAM 206 9th International Conference on Developments in esystems Engineering A Computational Investigation of a Turbulent Flow Over a Backward Facing Step with OpenFOAM Hayder Al-Jelawy, Stefan Kaczmarczyk

More information

EFFECT OF DIFFERENT PARAMETERS ON THE PERFORMANCE OF RIB ROUGHNESS SOLAR DUCT

EFFECT OF DIFFERENT PARAMETERS ON THE PERFORMANCE OF RIB ROUGHNESS SOLAR DUCT EFFECT OF DIFFERENT PARAMETERS ON THE PERFORMANCE OF RIB ROUGHNESS SOLAR DUCT Rahul Pratap Singh 1, Sudhanshu Mishra 2 1M.Tech, Research Scholar, Department of Mechanical Engineering, Shri Shankaracharya

More information

Performance of Elliptical Pin Fin Heat Exchanger with Three Elliptical Perforations

Performance of Elliptical Pin Fin Heat Exchanger with Three Elliptical Perforations www.cfdl.issres.net Vol. 3 (2) June 2011 Performance of Elliptical Pin Fin Heat Exchanger with Three Elliptical Perforations Monoj Baruah 1, Anupam Dewan 2c and P. Mahanta 1 1 Department of Mechanical

More information

Convective Heat Transfer and Thermal Performance in a Circular Tube Heat Exchanger Inserted with U-Shaped Baffle

Convective Heat Transfer and Thermal Performance in a Circular Tube Heat Exchanger Inserted with U-Shaped Baffle Journal of Mathematics and Statistics Original Research Paper Convective Heat Transfer and Thermal Performance in a Circular Tube Heat Exchanger Inserted with U-Shaped Baffle 1 Amnart Boonloi and 2 Withada

More information

CFD based flow and heat transfer analysis of various ribs in solar air heater duct by continuous ribs on absorber plate

CFD based flow and heat transfer analysis of various ribs in solar air heater duct by continuous ribs on absorber plate ISSN: 2454-132X Impact factor: 4.295 (Volume 4, Issue 3) Available online at: www.ijariit.com CFD based flow and heat transfer analysis of various ribs in solar air heater duct by continuous ribs on absorber

More information

FLOW AND HEAT TRANSFER ANALYSIS OF VARIOUS RIBS FOR FORCED CONVECTION HEAT TRANSFER

FLOW AND HEAT TRANSFER ANALYSIS OF VARIOUS RIBS FOR FORCED CONVECTION HEAT TRANSFER FLOW AND HEAT TRANSFER ANALYSIS OF VARIOUS RIBS FOR FORCED CONVECTION HEAT TRANSFER 1 Navanath.G.Ghodake, 2 Prof.MRC. Rao, 3 Dr. R. R. Arakerimath 1 ME heat power student, 2 professor, 3 Professor & Dean

More information

ENHANCEMENT OF HEAT TRANSFER FOR AIR FLOW THROUGH A DUCT WITH VARIOUS RIBS

ENHANCEMENT OF HEAT TRANSFER FOR AIR FLOW THROUGH A DUCT WITH VARIOUS RIBS International Journal of Mechanical and Production Engineering Research and Development (IJMPERD) ISSN(P): 2249-6890; ISSN(E): 2249-8001 Vol. 5, Issue 5, Oct 2015, 71-80 TJPRC Pvt. Ltd. ENHANCEMENT OF

More information

Chapter 8: Flow in Pipes

Chapter 8: Flow in Pipes 8-1 Introduction 8-2 Laminar and Turbulent Flows 8-3 The Entrance Region 8-4 Laminar Flow in Pipes 8-5 Turbulent Flow in Pipes 8-6 Fully Developed Pipe Flow 8-7 Minor Losses 8-8 Piping Networks and Pump

More information

COMPUTATIONAL FLUID DYNAMICS ANALYSIS ON HEAT TRANSFER AND FRICTION FACTOR CHARACTERISTICS OF A TURBULENT FLOW FOR INTERNALLY GROOVED TUBES

COMPUTATIONAL FLUID DYNAMICS ANALYSIS ON HEAT TRANSFER AND FRICTION FACTOR CHARACTERISTICS OF A TURBULENT FLOW FOR INTERNALLY GROOVED TUBES THERMAL SCIENCE: Year 2013, Vol. 17, No. 4, pp. 1125-1137 1125 COMPUTATIONAL FLUID DYNAMICS ANALYSIS ON HEAT TRANSFER AND FRICTION FACTOR CHARACTERISTICS OF A TURBULENT FLOW FOR INTERNALLY GROOVED TUBES

More information

Numerical investigation on turbulent forced convection and heat transfer characteristic in spirally semicircle-grooved tube

Numerical investigation on turbulent forced convection and heat transfer characteristic in spirally semicircle-grooved tube Promthaisong et al. International Journal of Mechanical and Materials Engineering (2016) 11:9 DOI 10.1186/s40712-016-0062-2 ORIGINAL ARTICLE Numerical investigation on turbulent forced convection and heat

More information

Numerical Study of Separation Length of Flow through Rectangular Channel with Baffle Plates

Numerical Study of Separation Length of Flow through Rectangular Channel with Baffle Plates Numerical Study of Separation Length of Flow through Rectangular Channel with Baffle Plates M. M. Jamil 1, M. I. Adamu 1, T. R. Ibrahim 2 and G. A. Hashim *,3 1 Kano state Ministry for Higher Education,

More information

NUMERICAL INVESTIGATION OF COUNTER FLOW ISOSCELES RIGHT TRIANGULAR MICROCHANNEL HEAT EXCHANGER

NUMERICAL INVESTIGATION OF COUNTER FLOW ISOSCELES RIGHT TRIANGULAR MICROCHANNEL HEAT EXCHANGER International Journal of Mechanical Engineering and Technology IJMET) Volume 8, Issue 1, January 217, pp. 81 87, Article ID: IJMET_8_1_9 Available online at http://www.iaeme.com/ijmet/issues.asp?jtype=ijmet&vtype=8&itype=1

More information

Table of Contents. Foreword... xiii. Preface... xv

Table of Contents. Foreword... xiii. Preface... xv Table of Contents Foreword.... xiii Preface... xv Chapter 1. Fundamental Equations, Dimensionless Numbers... 1 1.1. Fundamental equations... 1 1.1.1. Local equations... 1 1.1.2. Integral conservation equations...

More information

Effect of rib height on heat transfer and friction factor in a square channel roughened by inclined ribs with a gap

Effect of rib height on heat transfer and friction factor in a square channel roughened by inclined ribs with a gap International Journal of Thermal Technologies E-ISSN 2277 4114 2017 INPRESSCO, All Rights Reserved Available at http://inpressco.com/category/ijtt/ Research Article Effect of rib height on heat transfer

More information

CFD Analysis of Forced Convection Flow and Heat Transfer in Semi-Circular Cross-Sectioned Micro-Channel

CFD Analysis of Forced Convection Flow and Heat Transfer in Semi-Circular Cross-Sectioned Micro-Channel CFD Analysis of Forced Convection Flow and Heat Transfer in Semi-Circular Cross-Sectioned Micro-Channel *1 Hüseyin Kaya, 2 Kamil Arslan 1 Bartın University, Mechanical Engineering Department, Bartın, Turkey

More information

Investigation of Flow Profile in Open Channels using CFD

Investigation of Flow Profile in Open Channels using CFD Investigation of Flow Profile in Open Channels using CFD B. K. Gandhi 1, H.K. Verma 2 and Boby Abraham 3 Abstract Accuracy of the efficiency measurement of a hydro-electric generating unit depends on the

More information

6.2 Governing Equations for Natural Convection

6.2 Governing Equations for Natural Convection 6. Governing Equations for Natural Convection 6..1 Generalized Governing Equations The governing equations for natural convection are special cases of the generalized governing equations that were discussed

More information

COMPUTATIONAL SIMULATION OF THE FLOW PAST AN AIRFOIL FOR AN UNMANNED AERIAL VEHICLE

COMPUTATIONAL SIMULATION OF THE FLOW PAST AN AIRFOIL FOR AN UNMANNED AERIAL VEHICLE COMPUTATIONAL SIMULATION OF THE FLOW PAST AN AIRFOIL FOR AN UNMANNED AERIAL VEHICLE L. Velázquez-Araque 1 and J. Nožička 2 1 Division of Thermal fluids, Department of Mechanical Engineering, National University

More information

International Conference on Energy Efficient Technologies For Automobiles (EETA 15) Journal of Chemical and Pharmaceutical Sciences ISSN:

International Conference on Energy Efficient Technologies For Automobiles (EETA 15) Journal of Chemical and Pharmaceutical Sciences ISSN: HEAT TRANSFER ENHANCEMENT WITH PRESSURE LOSS REDUCTION IN COMPACT HEAT EXCHANGERS USING VORTEX GENERATORS Viswajith M V*, Gireesh Kumaran Thampi, James Varghese Department of Mechanical Engineering, School

More information

Numerical Investigation of Thermal Performance in Cross Flow Around Square Array of Circular Cylinders

Numerical Investigation of Thermal Performance in Cross Flow Around Square Array of Circular Cylinders Numerical Investigation of Thermal Performance in Cross Flow Around Square Array of Circular Cylinders A. Jugal M. Panchal, B. A M Lakdawala 2 A. M. Tech student, Mechanical Engineering Department, Institute

More information

Numerical analysis of fluid flow and heat transfer in 2D sinusoidal wavy channel

Numerical analysis of fluid flow and heat transfer in 2D sinusoidal wavy channel Numerical analysis of fluid flow and heat transfer in 2D sinusoidal wavy channel Arunanshu Chakravarty 1* 1 CTU in Prague, Faculty of Mechanical Engineering, Department of Process Engineering,Technická

More information

Comparison of Turbulence Models in the Flow over a Backward-Facing Step Priscila Pires Araujo 1, André Luiz Tenório Rezende 2

Comparison of Turbulence Models in the Flow over a Backward-Facing Step Priscila Pires Araujo 1, André Luiz Tenório Rezende 2 Comparison of Turbulence Models in the Flow over a Backward-Facing Step Priscila Pires Araujo 1, André Luiz Tenório Rezende 2 Department of Mechanical and Materials Engineering, Military Engineering Institute,

More information

OVERALL HEAT TRANSFER ENHANCEMENT OF TRIANGULAR OBSTACLES

OVERALL HEAT TRANSFER ENHANCEMENT OF TRIANGULAR OBSTACLES International Journal of Automotive and Mechanical Engineering (IJAME) ISSN: 2229-8649 (Print); ISSN: 2180-1606 (Online); Volume 8, pp. 1278-1291, July-December 2013 Universiti Malaysia Pahang DOI: http://dx.doi.org/10.15282/ijame.8.2013.17.0105

More information

ADVANCES in NATURAL and APPLIED SCIENCES

ADVANCES in NATURAL and APPLIED SCIENCES ADVANCES in NATURAL and APPLIED SCIENCES ISSN: 1995-0772 Published BYAENSI Publication EISSN: 1998-1090 http://www.aensiweb.com/anas 2017 September 11(11): 1-10 Open Access Journal Two-Dimensional Numerical

More information

Experimental Validation of Heat Transfer Enhancement in plate Heat Exchanger with Non Conventional Shapes of Rib

Experimental Validation of Heat Transfer Enhancement in plate Heat Exchanger with Non Conventional Shapes of Rib Experimental Validation of Heat Transfer Enhancement in plate Heat Exchanger with Non Conventional Shapes of Rib 1 Miss. Ashwini Vasant Thakare, 2 Dr. J. A. Hole 1 M.Tech Student of JSPM Narhe Technical

More information

The Effect of Solid and Perforated Pin Fin on the Heat Transfer Performance of Finned Tube Heat Exchanger

The Effect of Solid and Perforated Pin Fin on the Heat Transfer Performance of Finned Tube Heat Exchanger International Journal of Energy Engineering 2018, 8(1): 1-11 DOI: 10.5923/j.ijee.20180801.01 The Effect of Solid and Perforated Pin Fin on the Heat Transfer Performance of Finned Tube Heat Exchanger Nabil

More information

Meysam ATASHAFROOZ, Seyyed Abdolreza GANDJALIKHAN NASSAB, and Amir Babak ANSARI

Meysam ATASHAFROOZ, Seyyed Abdolreza GANDJALIKHAN NASSAB, and Amir Babak ANSARI THERMAL SCIENCE: Year 014, Vol. 18, No., pp. 479-49 479 NUMERICAL INVESTIGATION OF ENTROPY GENERATION IN LAMINAR FORCED CONVECTION FLOW OVER INCLINED BACKWARD AND FORWARD FACING STEPS IN A DUCT UNDER BLEEDING

More information

BOUNDARY LAYER ANALYSIS WITH NAVIER-STOKES EQUATION IN 2D CHANNEL FLOW

BOUNDARY LAYER ANALYSIS WITH NAVIER-STOKES EQUATION IN 2D CHANNEL FLOW Proceedings of,, BOUNDARY LAYER ANALYSIS WITH NAVIER-STOKES EQUATION IN 2D CHANNEL FLOW Yunho Jang Department of Mechanical and Industrial Engineering University of Massachusetts Amherst, MA 01002 Email:

More information

Numerical Methods in Aerodynamics. Turbulence Modeling. Lecture 5: Turbulence modeling

Numerical Methods in Aerodynamics. Turbulence Modeling. Lecture 5: Turbulence modeling Turbulence Modeling Niels N. Sørensen Professor MSO, Ph.D. Department of Civil Engineering, Alborg University & Wind Energy Department, Risø National Laboratory Technical University of Denmark 1 Outline

More information

Performance evaluations of two pass solar air heater using 60⁰ inclinedvshaped ribs on absorber plate

Performance evaluations of two pass solar air heater using 60⁰ inclinedvshaped ribs on absorber plate International Journal of Engineering Science Invention ISSN (Online): 2319 6734, ISSN (Print): 2319 6726 Volume 3 Issue 8 ǁ August 2014 ǁ PP.01-10 Performance evaluations of two pass solar air heater using

More information

Introduction to Heat and Mass Transfer. Week 12

Introduction to Heat and Mass Transfer. Week 12 Introduction to Heat and Mass Transfer Week 12 Next Topic Convective Heat Transfer» Heat and Mass Transfer Analogy» Evaporative Cooling» Types of Flows Heat and Mass Transfer Analogy Equations governing

More information

Design of an innovative internal structure for surface solar air heater s

Design of an innovative internal structure for surface solar air heater s 1 Design of an innovative internal structure for surface solar air heater s Arnaud Colleoni TOTAL, Energies Nouvelles 2 place Jean Miller, La Défense 6 98078 Paris, FRANCE email: arnaud.colleoni@total.com

More information

DNS STUDY OF TURBULENT HEAT TRANSFER IN A SPANWISE ROTATING SQUARE DUCT

DNS STUDY OF TURBULENT HEAT TRANSFER IN A SPANWISE ROTATING SQUARE DUCT 10 th International Symposium on Turbulence and Shear Flow Phenomena (TSFP10), Chicago, USA, July, 2017 DNS STUDY OF TURBULENT HEAT TRANSFER IN A SPANWISE ROTATING SQUARE DUCT Bing-Chen Wang Department

More information

Prediction of Performance Characteristics of Orifice Plate Assembly for Non-Standard Conditions Using CFD

Prediction of Performance Characteristics of Orifice Plate Assembly for Non-Standard Conditions Using CFD International Journal of Engineering and Technical Research (IJETR) ISSN: 2321-0869, Volume-3, Issue-5, May 2015 Prediction of Performance Characteristics of Orifice Plate Assembly for Non-Standard Conditions

More information

Numerical Validation of Flow Through an S-shaped Diffuser

Numerical Validation of Flow Through an S-shaped Diffuser 2012 International Conference on Fluid Dynamics and Thermodynamics Technologies (FDTT 2012) IPCSIT vol.33(2012) (2012) IACSIT Press, Singapore Numerical Validation of Flow Through an S-shaped Diffuser

More information

Principles of Convection

Principles of Convection Principles of Convection Point Conduction & convection are similar both require the presence of a material medium. But convection requires the presence of fluid motion. Heat transfer through the: Solid

More information

IJSRD - International Journal for Scientific Research & Development Vol. 4, Issue 05, 2016 ISSN (online):

IJSRD - International Journal for Scientific Research & Development Vol. 4, Issue 05, 2016 ISSN (online): IJSRD - International Journal for Scientific Research & Development Vol. 4, Issue 05, 2016 ISSN (online): 2321-0613 Performance of Rectangular Baffle Plate Shell and Tube Heat Exchanger using Computational

More information

PERIODICALLY FULLY DEVELOPED LAMINAR FLOW AND HEAT TRANSFER IN A 2-D HORIZONTAL CHANNEL WITH STAGGERED FINS

PERIODICALLY FULLY DEVELOPED LAMINAR FLOW AND HEAT TRANSFER IN A 2-D HORIZONTAL CHANNEL WITH STAGGERED FINS THERMAL SCIENCE: Year 2017, Vol. 21, No. 6A, pp. 2443-2455 2443 PERIODICALLY FULLY DEVELOPED LAMINAR FLOW AND HEAT TRANSFER IN A 2-D HORIZONTAL CHANNEL WITH STAGGERED FINS by Oguz TURGUT a* and Kamil ARSLAN

More information

PARTICLE IMAGE VELOCIMETRY AND PROPER ORTHOGONAL DECOMPOSITION ANALYSIS OF THE CHANNEL FLOW EQUIPPED WITH CYLINDRICAL RIBS.

PARTICLE IMAGE VELOCIMETRY AND PROPER ORTHOGONAL DECOMPOSITION ANALYSIS OF THE CHANNEL FLOW EQUIPPED WITH CYLINDRICAL RIBS. PARTICLE IMAGE VELOCIMETRY AND PROPER ORTHOGONAL DECOMPOSITION ANALYSIS OF THE CHANNEL FLOW EQUIPPED WITH CYLINDRICAL RIBS Cahit Gurlek Department of Mechanical Engineering, University of Cumhuriyet, 58140

More information

CFD AND CONJUGATE HEAT TRANSFER ANALYSIS OF HEAT SINKS WITH DIFFERENT FIN GEOMETRIES SUBJECTED TO FORCED CONVECTION USED IN ELECTRONICS COOLING

CFD AND CONJUGATE HEAT TRANSFER ANALYSIS OF HEAT SINKS WITH DIFFERENT FIN GEOMETRIES SUBJECTED TO FORCED CONVECTION USED IN ELECTRONICS COOLING CFD AND CONJUGATE HEAT TRANSFER ANALYSIS OF HEAT SINKS WITH DIFFERENT FIN GEOMETRIES SUBJECTED TO FORCED CONVECTION USED IN ELECTRONICS COOLING V. M Kulkarni 1, Basavaraj Dotihal 2 1 Professor, Thermal

More information

Department of Mechanical Engineering, M.A.C.T. (R.E.C.), Bhopal , India b. Received 15 December 2000; accepted 15 January 2001

Department of Mechanical Engineering, M.A.C.T. (R.E.C.), Bhopal , India b. Received 15 December 2000; accepted 15 January 2001 Renewable Energy 25 (2002) 341 369 www.elsevier.nl/locate/renene Heat transfer coefficient and friction factor correlations for rectangular solar air heater duct having transverse wedge shaped rib roughness

More information

Numerical Study of Convective Heat Transfer for Flat Unglazed Transpired Solar Collectors

Numerical Study of Convective Heat Transfer for Flat Unglazed Transpired Solar Collectors Purdue University Purdue e-pubs International High Performance Buildings Conference School of Mechanical Engineering 2012 Numerical Study of Convective Heat Transfer for Flat Unglazed Transpired Solar

More information

Keywords - Gas Turbine, Exhaust Diffuser, Annular Diffuser, CFD, Numerical Simulations.

Keywords - Gas Turbine, Exhaust Diffuser, Annular Diffuser, CFD, Numerical Simulations. Numerical Investigations of PGT10 Gas Turbine Exhaust Diffuser Using Hexahedral Dominant Grid Vaddin Chetan, D V Satish, Dr. Prakash S Kulkarni Department of Mechanical Engineering, VVCE, Mysore, Department

More information

Explicit algebraic Reynolds stress models for internal flows

Explicit algebraic Reynolds stress models for internal flows 5. Double Circular Arc (DCA) cascade blade flow, problem statement The second test case deals with a DCA compressor cascade, which is considered a severe challenge for the CFD codes, due to the presence

More information

ARTICLE IN PRESS. K.R. Aharwal a,, B.K. Gandhi b, J.S. Saini b

ARTICLE IN PRESS. K.R. Aharwal a,, B.K. Gandhi b, J.S. Saini b newable Energy 33 (2008) 585 596 www.elsevier.com/locate/renene Experimental investigation on heat-transfer enhancement due to a gap in an inclined continuous rib arrangement in a rectangular duct of solar

More information

Theoretical prediction of performance of Single and Double pass solar air heaters with artificial roughened absorber plates

Theoretical prediction of performance of Single and Double pass solar air heaters with artificial roughened absorber plates International Journal of Thermal Technologies E-ISSN 2277 4114 2018 INPRESSCO, All Rights Reserved Available at http://inpressco.com/category/ijtt/ Research Article Theoretical prediction of performance

More information

Analysis of Fully Developed Turbulent Flow in a AXI-Symmetric Pipe using ANSYS FLUENT Software

Analysis of Fully Developed Turbulent Flow in a AXI-Symmetric Pipe using ANSYS FLUENT Software Analysis of Fully Developed Turbulent Flow in a AXI-Symmetric Pipe using ANSYS FLUENT Software Manish Joshi 1, Priyanka Bisht, Dr. Anirudh Gupta 3 1 M. Tech Scholar, M. Tech Scholar, 3 Associate Professor

More information

CFD Analysis on Flow Through Plate Fin Heat Exchangers with Perforations

CFD Analysis on Flow Through Plate Fin Heat Exchangers with Perforations CFD Analysis on Flow Through Plate Fin Heat Exchangers with Perforations 1 Ganapathi Harish, 2 C.Mahesh, 3 K.Siva Krishna 1 M.Tech in Thermal Engineering, Mechanical Department, V.R Siddhartha Engineering

More information

Investigation of Non-Newtonian Fluids Flow Behavior in a Double Step Expansion Channel: Part 1

Investigation of Non-Newtonian Fluids Flow Behavior in a Double Step Expansion Channel: Part 1 Investigation of Non-Newtonian Fluids Flow Behavior in a Double Step Expansion Channel: Part 1 Qais A. Rishack Mechanical Engineering Department Engineering College, Basra University Basra, Iraq Khudheyer

More information

Numerical Study of the Three-dimensional Flow in a Flat Plate Solar Collector with Baffles

Numerical Study of the Three-dimensional Flow in a Flat Plate Solar Collector with Baffles Numerical Study of the Three-dimensional Flow in a Flat Plate Solar Collector with Baffles M.A. AMRAOUI a, K. ALIANE b a. Department of Mechanical Engineering, Faculty of Technology, University of Tlemcen,

More information

CFD Analysis & Experimental Investigation to improve Heat Transfer Enhancement in flat plate with W Ribs

CFD Analysis & Experimental Investigation to improve Heat Transfer Enhancement in flat plate with W Ribs Analysis & erimental Investigation to improve Heat Transfer Enhancement in flat with W Ribs Jayshri S Gulave 1, Kulkarni V.S. 2 Parag S. Desale 3 1 M.E Student Matoshri college of Engineering, Nashik,

More information

WALL ROUGHNESS EFFECTS ON SHOCK BOUNDARY LAYER INTERACTION FLOWS

WALL ROUGHNESS EFFECTS ON SHOCK BOUNDARY LAYER INTERACTION FLOWS ISSN (Online) : 2319-8753 ISSN (Print) : 2347-6710 International Journal of Innovative Research in Science, Engineering and Technology An ISO 3297: 2007 Certified Organization, Volume 2, Special Issue

More information